MadAnalysis 5

New value for luminosity

Asked by Safinaz

Hi authors,

I'm using MadAnalysis5_v1.1.9, when I try to modify the
luminosity value by:

set main . lumi = 200 , it gives :
the class dataset has no attribute denoted by 'luminosity'.

I run my commands as follows:
ma5> import <path> unweighted_events.lhe.gz as main
ma5> set main . normalize=lumi
ma5> set main . lumi = 200

So why it shows me this massage. .
Regards,
Safinaz

Question information

Language:
English Edit question
Status:
Solved
For:
MadAnalysis 5 Edit question
Assignee:
Benjamin Fuks Edit question
Solved by:
Benjamin Fuks
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Benjamin Fuks (fuks) said : 		#1

Dear Safinaz,

The word "main" belongs to a list of reserved keywords that cannot be used for denoting datasets. In v1.1.10, an error message (missing in v1.1.9) will be displayed if you try to do it.

Best regards and thanks for pointing this out.

Benjamin

Revision history for this message
Safinaz (sramadan) said : 		#2

Hi Dr. Benjamin,

Yes, I understood this now , I can just type:
set main.lumi=200 so that my dataset whatever its name
change its luminosity value .

Thank you for that. May I have another question please about
the parton-level and Reco-level , for example for a process p p > b b~ b b~ :

Is it right to get the number of event in M( b b~)
plot at -p level say ~ 10^4 the same as the number of event in M( l- l+)
o r M( l- j ) (consider l- l+ j are b quark final state) ..

I mean should the number of events decrease or increase at Reco-
level due to jet clustring or detector effects or is it fixed?

Regards,
Safinaz

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Best Benjamin Fuks (fuks) said : 		#3

Hi Safinaz,

The luminosity is *not* a property of a dataset. Please have a look to the manual with this respect. You *cannot* name a dataset "main". Please choose anything else (or use v1.1.10beta).

I am not sure to understand your second question. The integral of the M(bb) or M(ll) histograms is not necessarily equal the number of events. You could have several (or zero) entries for each event. For the rest, it depends on your Monte Carlo setup.

Cheers,

Benjamin

Revision history for this message
Safinaz (sramadan) said : 		#4

Thanks Benjamin Fuks, that solved my question.